If that happens expect to see ol O crack.
Hillary will then challenge him for 2012.
I would be less surprised if the Dems decide to stage an assassination. He's a big loser for them and paints them in all sorts of political corners. So by getting rid of him, they benefit three ways: 1) they get rid of him and he's been a real political liability, 2) anything they can claim he would have supported, from gun registration to National Socialist Health Care, now gets a free ride, because the MSM makes sure it's political suicide to oppose it, and 3) they claim he was shot by a bigot and get to keep playing the race card till the end of time, instead of like now when it's losing credibility because a [half] black guy got elected to the highest office in the land.
I hope they don't, both because it would be wrong and because I think it might help them, but I wouldn't bet money on it.